Metric Conversions for TEAS 7

Correct Answer: A

Rationale: To convert liters to milliliters, you multiply by 1000 because 1 liter is equal to 1000 milliliters. So, 0.5 liters x 1000 = 500 milliliters. Therefore, the correct answer is A: 500 milliliters. Choices B, C, and D are incorrect because they do not follow the correct conversion factor from liters to milliliters. B is too small, C is even smaller, and D is a decimal value that does not represent a proper conversion.

Correct Answer: B

Rationale: To convert meters to kilometers, we divide by 1,000 since 1 kilometer is equal to 1,000 meters. Therefore, 1,000 meters divided by 1,000 equals 1 kilometer. Hence, the correct answer is B: 1 km. A: 0.1 km - Incorrect. This would be the equivalent of 100 meters. C: 10 km - Incorrect. This would be the equivalent of 10,000 meters. D: 0.01 km - Incorrect. This would be the equivalent of 10 meters.

Correct Answer: A

Rationale: To calculate 0.5 multiplied by 20, you simply multiply 0.5 by 20, which equals 10. The correct answer is A (10). The other choices are incorrect because: B (15) is the result of 0.5 multiplied by 30. C (20) is the original number being multiplied, not the result. D (25) is the result of 0.5 multiplied by 50, not 20.

Correct Answer: D

Rationale: The correct answer is D: 1000 milliliters. 1 liter is equivalent to 1000 milliliters. This is because the metric system is based on the powers of 10, so there are 1000 milliliters in 1 liter. Choice A, 1 kilogram, is a unit of mass and not volume. Choice B, 1 quart, is a unit of volume but is not equivalent to 1 liter. Choice C, 1 milliliter, is much smaller than 1 liter, as it would take 1000 milliliters to make up 1 liter.

Correct Answer: A

Rationale: To convert mg to mcg, we need to multiply by 1000 since 1 mg = 1000 mcg. So, 0.25 mg x 1000 = 250 mcg. Therefore, the correct answer is A: 250 mcg. Choice B, C, and D are incorrect because they do not correctly convert milligrams to micrograms.